The physiological response of the body to high-altitude training includes increased red blood cell production and improved oxygen delivery to muscles. At higher altitudes, the reduced oxygen levels stimulate the production of erythropoietin, a hormone that encourages red blood cell formation. This adaptation enhances the body’s endurance capabilities, allowing athletes to perform better in lower oxygen environments. High-altitude training also leads to improved cardiovascular fitness and a stronger respiratory system. However, it can also result in temporary symptoms of altitude sickness, such as headaches and fatigue, as the body adjusts to the thinner air.